Spray gun



FIG. 1 is a perspective view of a spray gun as viewed from the front right side;

FIG. 2 is a right side elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line showing of the threaded attachment is included for the purpose of illustrating and forms no part of the claimed design. 

CLAIM The ornamental design for a spray gun, as shown and described. 